Portosystemic shunt

 

Portal vein connect with systemic circulation via the liver circulation through the hepatic veins. But there are collateral circulation by which the portal vein indirectly connects with systemic circulation. They include

  • Esophago-esophageal anastomosis. This is between the esophageal tributaries of the left gastric vein and the esophageal branches of azygos vein.

  • Tributaries of the superior rectal vein and the those of the inferior rectal vein.

  • Retroperitoneal veins and mesenteric veins of the intestine.

  • Veins of the anterior abdominal wall via the falciform ligament and portal branches in the liver. These produce caput medusae.

  • Portal branches of the liver and the veins of diaphragm at the bare area of the liver.

     
   

 

   

 

   

 

   

 

 

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Portal hypertension
Portocaval anastomoses
Portosystemic obstruction
Portal venogram

Hepatic encephalopathy
Portosystemic shunt

Schistosomiasis

 

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